Dental appliance



FIG. 1 is a perspective view of a dental appliance;

FIG. 2 is a left view;

FIG. 3 is a right view;

FIG. 4 is a back view;

FIG. 5 is a front view; and,

FIG. 6 is a top view.

CLAIM The ornamental design for a dental appliance, as shown anddescribed.